GeForce GTX 660 Ti SLI is a solution of two GeForce GTX 660 Ti put together using NVIDIA'S SLI technology. Check the page of <a href = http://www.game-debate.com/hardware/index.php?gid=874&graphics=GeForce%20GTX%20660%20Ti> GeForce GTX 660 Ti</a> to know more about its chip. As usual, SLI relies a lot on proper driver support and may suffer from micro-stuttering in lower frame rates (below 30). Benchmarks indicate the performance is overall, is up to X% better than a single GeForce GTX 660 Ti performing by itself but at times (depending whether or not the 3D game supports SLI or in the graphics driver) it performed worse than a single GeForce GTX 660 Ti. Expect this combination to draw up to 300 Watt though the average power consumption should be slightly lower. Even the most demanding games will run at the highest settings.

As soon as I get a new Mobo and CPU im going to save up for another 660Ti.. I saw some benchmarks and 660Ti runs effectively between 20 - 30 % faster than a GTX680 depending on the game… Oh and effectively you will still only be getting 2gb GPU memory from this setup.